I was going to link a video I liked but I can't find it, but basically the guy explained how to set up a canister filter the best way possible and it made a whole lot of sense to me so I try to do it the same way.
you can start the mechanical filtration on the intake if you want or wherever the water flows into the first basket, this is where you want noodles or course pads or whatever to disperse the water and grab the chunky waste, gradually make the pads more fine towards the top of the basket to filter as much particles that can clog your media pores.
then fill the rest of your baskets with the best media you can afford, eheimpro, matrix, bioglass, etc....
finally top with carbon or whatever if you must, but this guy argued to not top with any polishing pads or quilt batting because you don't want to restrict flow out of the filter, clogging it up will only hurt your biomedia, clog the pores, gunk it up etc...
Makes sense to me, I'm not sure why a lot of filters are designed with pads last when really you need them before the biomedia